[mythtv-users] Nvidia 8400GS PCI, High Xorg CPU, Tearing

[Lee Koloszyc]

Hi folks,

My Nvidia 6200 AGP died the other day, so I picked up an 8400GS PCI, 
thinking great I will be ready for the VDPAU and it should just be a pop 
it in and everything will work nicely.

This certainly hasn't been the case, the 6200 was able to playback 1080i 
video perfectly with xv on my LCD panel with a DVI-HDMI connection.  
During the instance the CPU would be around 75-80% with 60-65% coming 
from mythfrontend, the rest coming from X or other process. 
After replacing it with the 8400GS, I get loads of tearing and just a 
horrible looking picture, even with SD (though SD is watchable sort 
of).  The problem seems to be with X windows taking more CPU time then 
mythfrontend, playing 1080i about 55% is going to X and 40% or so to 
mythfrontend.

I've researched it as much as I could and tried all combinations of 
UseEvents, Sync to Vblank, OpenGL sync all to no avail. 

Thanks,
Lee

Kernel: 2.6.26-gentoo-r3
Processor:       AMD Athlon 64 3000+
MotherBoard:  MSI Neo2 (nforce 3 ultra)
Memory:          1GB
VideoCard:      PNY GeForce 8400GS PCI 512MB (Nvidia 8 series)
Video Tuners:  Fusion HDTV USB, PVR150, HDHomeRun

xorg-server-1.3.0.0-r6
nvidia-drivers-177.80 (also tried 177.82 and 180.11 same problem)
mythtv-0.21_p16505

xorg.conf (worked with my old card)

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    Option "RenderAccel"    "True"
    Option "UseEvents"      "True"
EndSection

Xorg.0.log

(**) NVIDIA(0): Option "RenderAccel" "True"
dme(**) NVIDIA(0): Option "UseEvents" "True"
(**) NVIDIA(0): Enabling RENDER acceleration
(**) NVIDIA(0): Use of AGP disabled per request
(II) NVIDIA(0): NVIDIA GPU GeForce 8400 GS (G98) at PCI:3:0:0 (GPU-0)
(--) NVIDIA(0): Memory: 524288 kBytes
(--) NVIDIA(0): VideoBIOS: 62.98.20.00.51
(II) NVIDIA(0): Detected PCI Express Link width: 1X
(--) NVIDIA(0): Interlaced video modes are supported on this GPU
(--) NVIDIA(0): Connected display device(s) on GeForce 8400 GS at PCI:3:0:0:
(--) NVIDIA(0):     TSB-TV (DFP-0)
(--) NVIDIA(0): TSB-TV (DFP-0): 330.0 MHz maximum pixel clock
(--) NVIDIA(0): TSB-TV (DFP-0): Internal Dual Link TMDS
(II) NVIDIA(0): Assigned Display Device: DFP-0
(II) NVIDIA(0): Initialized GPU GART.
(II) Loading extension NV-GLX
(II) NVIDIA(0): NVIDIA 3D Acceleration Architecture Initialized
(II) NVIDIA(0): Using the NVIDIA 2D acceleration architecture
(==) NVIDIA(0): Backing store disabled
(==) NVIDIA(0): Silken mouse enabled





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